A nanoreactor based on SrTiO3 coupled TiO2 nanotubes confined Au nanoparticles for photocatalytic hydrogen evolution |
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| Affiliation: | 1. Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, China;2. College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China;1. Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Av. Brasil, 2085, Valparaíso, Chile;2. Aix Marseille University, Univ Toulon, CNRS, IRD, Mediterranean Institute of Oceanography, MIO UM 110, 13288, Marseille, France;3. LBE, Univ Montpellier, INRA, Narbonne, France;1. State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;2. Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, Hangzhou 310013, China;3. Guangdong Provincial Key Laboratory of Advance Energy Storage Materials, South China University of Technology, Guangzhou, 510640, China;1. College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, China;2. College of Nature Resources, Department of Forest Biomaterials, North Carolina State University, 27695, Faucette Dr, Raleigh, USA;3. Division of Environmental Engineering Science Faculty of Science and Technology, Gunma University, Kiryu, Japan;4. Dalian Chivy Biotechnology Co. Ltd., Dalian, 116000, China;1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, CAS, Changchun, 130022, China;2. School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China;1. Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou, Jiangsu, 221008, China;2. School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, Jiangsu, 221008, China;3. Amap, Inra, Cnrs, Ird, Cirad, University of Montpellier, Boulevard de La Lironde, 34398, Montpellier, Cedex 5, France |
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| Abstract: | A TiO2 nanotube-based nanoreactor was designed and fabricated by facile two steps synthesis: firstly, hydrothermal synthesized SrTiO3 was deposited on TiO2 nanotubes (TiO2NTs). Secondly, the Au nanoparticles (NPs) were encapsulated inside the TiO2NTs followed by vacuum-assisted impregnation. The as-synthesized composites were characterized using Transmission electron microscopy (TEM), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Photoluminescence spectra (PL) and Ultraviolet–visible absorption spectroscopy (UV–vis). The photocatalytic performance was evaluated by the hydrogen evolution reaction. The results revealed that the SrTiO3 modified TiO2NTs confined Au NPs (STO-TiO2NTs@Au) achieved an enhanced hydrogen evolution rate at 7200 μmol h−1 g−1, which was 2.2 times higher than that of bald TiO2NTs@Au at 3300 μmol h−1 g−1. The improved photocatalytic activity could be attributed to the synergistic effect of the electron-donating of SrTiO3 and TiO2NTs confinement. The as-designed nanoreactor structure provides an example of efficient carriers' separation photocatalyst. |
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| Keywords: | Confinement Electron-donator Nanoreactor |
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